MNN.COM›Earth Matters›Wilderness & Resources›PHOTOS›

The greenest parks in America

The greenest parks in America

Photo 12 of 12  
Next: 9 images of volcanoes as seen from space

More galleries like this

8 wilderness icons under threat
In honor of Earth Day, we've compiled a list of eight icons of the wilderness — animals, plants and places — that are under threat from human activities, climate change or loss of habitat.
6 of the world's most remote communities
If you ever get sick of polite society and think you're up for the challenge of living way out there, take a look at these six remote communities.
7 whimsical, wonderful images of water
On the World Day for Water, the UN and member nations promote clean water initiatives to bring awareness of the fragile state of our freshwater systems. We're celebrating with a whimsical look at water and a reminder of why we need to protect it.
9 of the world's most majestic rivers in peril
Here are nine images of some of the world’s most majestic rivers in peril, and some ways we can help them.
How NASA is tracking sea ice in Antarctica
NASA has been mapping deteriorating glaciers in the Antarctic through the Operation IceBridge program over the world’s polar regions.
7 interesting bits of environmental trivia
The world needs more informed people — and more competitive games of Trivial Pursuit. Do the world a favor and read up on these seven useful bits of environmental trivia.